Electric switch.



0.1.21GLER @L W. P. HOLDEN.

ELECTRIC SWITCH.

APPLICATION FILED ri. r4, i914,

xteute Juy 11, 1916.

to get out of alinement; to provide contacts CHARLES JCQB ZIGLEB ANDWXLLIAM POOL4 0F CHICAGO` IIIILIN'OIS.y

ELECTRIC SWITCH.

slecineauon of Letters Patent'.

Patented' July ai, 1ere.

Drig'inal application led-August 27, 1913, `Serial No. 786,860.Dividedan'd this appliation filed February 111, 191e. Serial No.818361To all 'whom t mag/'concern' Be it known that we, 'CHARLES Jason''ZIGLER' and VVILLnw/rl Peon Hollum@ citizens f the United States,residing at Chicago,

in the county of Cook and State of Illinois,v

This application is a division of our former app Aication for electricswitches, led August, 7, 1913, serial No. 786,860, whichapplicatibndesribes the general construction ofan improved safety switchembodying our invention. c

The present invention relates more particularly to the contact members,and to the method .of attaching or mounting the same. Among/'the objectsot this invention are to provide a/switch structure having the vcontactsmountedvso that they are not apt Which may be adjusted for wear; toarrange the partsno as to" make as quick break as possiblewithout theuseoi springs; and in general'to improve the construction of suchdevices 'and cheapen the cost thereof.

In the accompanying drawings illustrating this invention: Figure 1 is afront view of a switch with the cover removed from the box; Fig. 2 is asectional view of the same; and, Figs. Sand 4 are details of thstationary contact members. Y r

While our switch members may be arranged in variousw-ays, we have shownthem in these drawings mounted in a box 5, which is providedvwithpartitions or supports 6 and?, .preferably made of insulating material.vThesesupports are each provided with one or more contacts 8 and 9, thoseon one support being arranged in alinement with corresponding ones onthe opposite support. These contacts are of the particularimproved formshown in detail in Figs.

3 and et, and comprise base portions 10, by means of which they aresecured to the plates, and outwardlv extending yielding contact portions11. The latter are substantially L-shaped with the coA tact portion 12,substantially parallel with the base 10. An adjusting screw 13 passesthrough the contact members 11, one of such members being tapped toreceive the threaded portion thereof, and is provided with a locking nut14. By means of this adjusting screw the blades maybe drawn together totake up any wear.

The movable contact members 15 are of the novel form clearly shownI inFigs. 1 and 2 and comprise flat blades with their ends given quarterturnsA so as to bring the contact portions at substantially right anglesto the f'laty central portion. These blades are mounted on 'a cylinder16 which is preferably made of Wood or other suitable inat 17 to receivethe flat central portion of the blades, which portions A t closely insuch slots, and are thereby held in proper alinement. The blades arefastened in such position by means of screws or the like 18. Thecylinder 16 is pivotally mounted midway between the upper and lowerstationary contacts,'and is provided with a handle 19 for turning thesame. The contact portion 12 of the stationary contact members arearranged so that they are substantiallyw at right angles to the ends ofthe blades 15, which permits the blades to pass in between the outer orfree ends of these contact portions. This permits the stationary contactblades to be mader of relatively heavy material, and yet gives aflexible yielding contact. The meth-od of mountingI 'the blades 15 inthe cylinder 16 makes a very eifective and substantial support for suchblades'and provides an exceedingly cheap form of construction.Furthermore, the twisting ofthe ends ofthe blades tends to stiflen thecontact portion thereof and to hold them in proper alinement It willalso be noted that on account of these-blades being'mounted on a rotarysupport between the upper and lower contact members, there is little orno twisting strain on the blades and the strains due to opening andclosing the switch or the roller, the ends of said blades being given aquarter turn so that they will stand in planes at right angles to theaxiso thev roller,

sulating material and is' slotted vas indicated y table sufppm'b havinga slot in the Side thereef, a cntact. blade secured in thebottoln 'ofsadeot with its ends extending some '-5 distance beyond the Support,each end of .said blade being given a' quarter turn so that it willstandn a vplane at right angles to the axis of the support to fermContacts'.

otatable cylinder formed of insu- 0 ik nsteh member comprising a rotala?latina' material and having a transverse Slot

